wpf 创建具有不同前/后拇指背景颜色的滑块
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时间：2020-09-13 05:11:20 来源:igfitidea点击:
Create slider with different before / after thumb background color
提问by Daniel Gilbert
I'm currently working on a media player. I'd like to create a slider like the one on this screen shot:
我目前正在研究媒体播放器。我想创建一个类似于此屏幕截图中的滑块：
What I've got up to now is this one:
我现在得到的是这个：
I'm currently struggeling with the light bar before the thumb. It changes it's length according to the thumb position. How can I implement this in WPF? Or should I try using a progressbar?
我目前正在与拇指前的灯条作斗争。它根据拇指位置改变它的长度。如何在 WPF 中实现它？或者我应该尝试使用进度条？
Atm, I have this code:
Atm，我有这个代码：
<LinearGradientBrush x:Key="SliderThumbGradient" StartPoint="0,0" EndPoint="0,1">
<GradientStop Offset="0" Color="#f7f7f7"/>
<GradientStop Offset="1" Color="#bcbcbc"/>
</LinearGradientBrush>
<Style x:Key="SliderButtonStyle" TargetType="{x:Type RepeatButton}">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Border Background="Transparent" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="SliderThumbStyle" TargetType="{x:Type Thumb}">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="Height" Value="14"/>
<Setter Property="Width" Value="14"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Ellipse
Name="Ellipse"
Fill="{DynamicResource SliderThumbGradient}"
Stroke="#404040"
StrokeThickness="1" />
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="Ellipse" Property="Fill" Value="#808080"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="Ellipse" Property="Fill" Value="#EEEEEE"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<ControlTemplate x:Key="HorizontalSlider" TargetType="{x:Type Slider}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto" MinHeight="{TemplateBinding Slider.MinHeight}"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<TickBar
Name="TopTick"
SnapsToDevicePixels="True"
Placement="Top"
Fill="#404040"
Height="4"
Visibility="Collapsed" />
<Border
Name="TrackBackground"
Margin="0"
CornerRadius="6"
Height="12"
Grid.Row="1"
Background="#0a0a0a"
BorderBrush="#121212"
BorderThickness="1" />
<Track Grid.Row="1" Name="PART_Track">
<Track.DecreaseRepeatButton>
<RepeatButton
Style="{StaticResource SliderButtonStyle}"
Command="Slider.DecreaseLarge" />
</Track.DecreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource SliderThumbStyle}" />
</Track.Thumb>
<Track.IncreaseRepeatButton>
<RepeatButton
Style="{StaticResource SliderButtonStyle}"
Command="Slider.IncreaseLarge" />
</Track.IncreaseRepeatButton>
</Track>
<TickBar
Name="BottomTick"
SnapsToDevicePixels="True"
Grid.Row="2"
Fill="{TemplateBinding Foreground}"
Placement="Bottom"
Height="4"
Visibility="Collapsed" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="TickPlacement" Value="TopLeft">
<Setter TargetName="TopTick" Property="Visibility" Value="Visible"/>
</Trigger>
<Trigger Property="TickPlacement" Value="BottomRight">
<Setter TargetName="BottomTick" Property="Visibility" Value="Visible"/>
</Trigger>
<Trigger Property="TickPlacement" Value="Both">
<Setter TargetName="TopTick" Property="Visibility" Value="Visible"/>
<Setter TargetName="BottomTick" Property="Visibility" Value="Visible"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<ControlTemplate x:Key="VerticalSlider" TargetType="{x:Type Slider}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto" MinWidth="{TemplateBinding Slider.MinWidth}"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TickBar
Name="TopTick"
SnapsToDevicePixels="True"
Placement="Left"
Fill="#404040"
Width="4"
Visibility="Collapsed" />
<Border
Name="TrackBackground"
Margin="0"
CornerRadius="2"
Width="4"
Grid.Column="1"
Background="#E0E0E0"
BorderBrush="#404040"
BorderThickness="1" />
<Track Grid.Column="1" Name="PART_Track">
<Track.DecreaseRepeatButton>
<RepeatButton
Style="{StaticResource SliderButtonStyle}"
Command="Slider.DecreaseLarge" />
</Track.DecreaseRepeatButton>
<Track.Thumb>
<Thumb Style="{StaticResource SliderThumbStyle}" />
</Track.Thumb>
<Track.IncreaseRepeatButton>
<RepeatButton
Style="{StaticResource SliderButtonStyle}"
Command="Slider.IncreaseLarge" />
</Track.IncreaseRepeatButton>
</Track>
<TickBar
Name="BottomTick"
SnapsToDevicePixels="True"
Grid.Column="2"
Fill="{TemplateBinding Foreground}"
Placement="Right"
Width="4"
Visibility="Collapsed" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="TickPlacement" Value="TopLeft">
<Setter TargetName="TopTick" Property="Visibility" Value="Visible"/>
</Trigger>
<Trigger Property="TickPlacement" Value="BottomRight">
<Setter TargetName="BottomTick" Property="Visibility" Value="Visible"/>
</Trigger>
<Trigger Property="TickPlacement" Value="Both">
<Setter TargetName="TopTick" Property="Visibility" Value="Visible"/>
<Setter TargetName="BottomTick" Property="Visibility" Value="Visible"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<Style TargetType="{x:Type Slider}">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Style.Triggers>
<Trigger Property="Orientation" Value="Horizontal">
<Setter Property="MinWidth" Value="104" />
<Setter Property="MinHeight" Value="21" />
<Setter Property="Template" Value="{StaticResource HorizontalSlider}" />
</Trigger>
<Trigger Property="Orientation" Value="Vertical">
<Setter Property="MinWidth" Value="21" />
<Setter Property="MinHeight" Value="104" />
<Setter Property="Template" Value="{StaticResource VerticalSlider}" />
</Trigger>
</Style.Triggers>
</Style>
回答by Mark Hall
The object that is changing its length on the left side is the DecreaseRepeatButton. You can implement the different color by creating a Style for it. Not sure how to get the concave edge on the right side though.
在左侧改变其长度的对象是DecreaseRepeatButton。您可以通过为其创建样式来实现不同的颜色。不知道如何获得右侧的凹边。
i.e.
IE
<Style x:Key="DecreaseSliderButtonStyle" TargetType="{x:Type RepeatButton}">
<Setter Property="SnapsToDevicePixels" Value="true"/>
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Border Height="12" Background="DimGray" CornerRadius="6" Margin="0,0,-12,0" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
and in your ControlTemplate:
并在您的 ControlTemplate 中：
<Track.DecreaseRepeatButton>
<RepeatButton
Style="{StaticResource DecreaseSliderButtonStyle}"
Command="Slider.DecreaseLarge" />
</Track.DecreaseRepeatButton>
